Geotechnical study in Llorenç del Penedès

In Llorenç del Penedès, the subsurface is dominated by compact gravel and sand, representing the vast majority of the ground, with occasional occurrences of limestones, dolomites and marbles. These characteristics provide good bearing capacity to the ground, making direct foundations viable for most buildings, although the low permeability may affect drainage in certain areas. It is advisable to check the lithological characteristics and the continuity of the granular layers in order to adequately define the depth of support.

Seismic activity in the area is moderate, with 30 recorded events over the last 30 years, but with a low maximum magnitude (Mmax 2.5), which implies a minor seismic constraint on the usual structural design. Given the presence of carbonate materials, it is essential to carry out a specific risk assessment for karstification before executing the foundation, as possible cavities may affect ground stability. The non-clayey substrate rules out the presence of expansivity, leaving the assessment of karst as the key aspect to consider in the local geotechnical study.